Manually editing partition table Post: 302425728

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Operating Systems Solaris Manually editing partition table Post 302425728 by adelsin on Saturday 29th of May 2010 10:54:39 AM

05-29-2010

Registered User

Manually editing partition table

I'm manually editing the partition table purely for experimenting. I did

Code:

prtvtoc /dev/dsk/c1t0d0s2 > /tmp/prtvtoc

I'm trying to split up partition 5 to make partition 6. I'm running into a cylinder boundary error on partition 6. Any clues?

Code:

# vi /tmp/prtvtoc
"/tmp/prtvtoc" 23 lines, 769 characters
* /dev/dsk/c1t0d0s2 partition map
*
* Dimensions:
*     512 bytes/sector
*     424 sectors/track
*      24 tracks/cylinder
*   10176 sectors/cylinder
*   14089 cylinders
*   14087 accessible cylinders
*
* Flags:
*   1: unmountable
*  10: read-only
*
*                          First     Sector    Last
* Partition  Tag  Flags    Sector     Count    Sector  Mount Directory
       0      2    00          0  20484288  20484287   /
       1      4    00   20484288  20484288  40968575   /usr
       2      5    00          0 143349312 143349311
       3      3    01   40968576  20484288  61452863
       4      7    00   61452864  61442688 122895551   /var
       5      0    00  122895552  20240064 143135616   /opt
       6      8    00  143145791    213694 143349311

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LEARN ABOUT PLAN9

wren

WREN(3) 						     Library Functions Manual							   WREN(3)

NAME

       wren, ata - hard disk interface

SYNOPSIS

       bind #H[drive] /dev
       bind #w[target[.lun]] /dev

       /dev/hd0disk
       /dev/hd0partition
       /dev/sd0disk
       /dev/sd0partition
	...

DESCRIPTION

       The  hard  disk interfaces (wren, #w, is a SCSI disk; ata, #H, is an IDE or ATA disk) serve a one-level directory giving access to the hard
       disk partitions.  The parameter to attach defines the numerical SCSI target and logical unit number or the  IDE	drive  number  to  access.
       Both default to zero.

       Each  partition name is prefixed by hd and the numeric drive identifier.  The partition always exists and covers the entire disk.  The size
       of each partition as reported by stat(2) is the number of bytes in the partition, so the size of is the size of the entire disk.

       The partition also always exists; it is the last block on the disk for SCSI, second to last for IDE.  If it contains valid partition  data,
       those  partitions will be visible as well.  Every time the device is bound, the partitions are updated to reflect any changes in the parti-
       tion file.

       The format of the partition file is the string

	      plan9 partitions

       on a line, followed by partition specifications, one per line, consisting of a name and textual strings for the block start and	limit  for
       each partition on the disk.

       The program prep(8) writes the partition table for the disk; its use is preferred to writing it by hand.

SEE ALSO

       prep(8), scsi(3)

SOURCE

       /sys/src/9/port/devwren.c
       /sys/src/9/pc/devata.c

																	   WREN(3)